uart.h

the 232 control demo source for the NEC mcu

// Asynchronous serial interface operation mode register (ASIM0, ASIM6)
#define Uart0_Asim0_Reset_Value  		0x01    // only for ASIM0 in UART0
#define Uart_Power_On  				0x80
#define Uart_Power_Off  			0x00			
#define Uart_Not_Parity 			0x00
#define Uart_Zero_Parity 			0x08
#define Uart_Odd_Parity 			0x10
#define Uart_Even_Parity 			0x18
#define Uart_Data_Bit_8	 			0x04
#define Uart_Data_Bit_7	 			0x00
#define Uart_Stop_Bit_2 			0x02
#define Uart_Stop_Bit_1 			0x00

#define Uart0_Transmit_Enable() 		TXE0 = 1
#define Uart0_Transmit_Disable() 		TXE0 = 0	
#define Uart0_Receive_Enable()			RXE0 = 1
#define Uart0_Receive_Disable() 		RXE0 = 0



//Asynchronous serial interface reception error status register (ASIS0, ASIS6)
#define Uart_Parity_Error  		0x04  //the parity of transmit data doesn't match the parity bit on completion of reception
 
#define Uart_Framing_Error  		0x02  //the stop bit is not detected on completion of reception

#define Uart_Overrun_Error  		0x01  //If receive data is set to the RXB6 register and the next reception operation
                                      		//is completed before the data is read
                                      

                                      

// Format of Baud Rate Generator Control Register 0 (BRGC0). only for UART0. Detailsp Pls refer to page333 in manual 
#define Uart0_BaseClk_1			0x00       // fxclk0 = TM50 output
#define Uart0_BaseClk_2			0x40       // fxclk0 = fprs/2
#define Uart0_BaseClk_3			0x80       // fxclk0 = fprs/8
#define Uart0_BaseClk_4			0xc0       // fxclk0 = fprs/32



//Format of Port Mode Register 1 (PM1) (UART0, UART6)
#define Uart_TxD_Output_Mode		0      // PM10, PM13
#define Uart_TxD_Output_Init		1      // initialization to output high level
#define Uart_RxD_Iutput_Mode		1      // PM11, PM14